Humidity Calibration
The E+E calibration laboratory is accredited for relative humidity calibrations in the temperature range -70 °C to 200 °C (-94 °F to 392 °F). The reference is a high-end, sophisticated dual pressure – dual temperature humidity generator provides highest accuracy for the calibration of hygrometers and humidity generators. E+E Elektronik is also a Designated Institute (DI) responsible for maintaining the national standard for humidity in Austria.
Scope of Accreditation E+E Calibration Laboratory
| Calibration | Calibration object | Measurement conditions | Measurement range1) | Calibration uncertainty | |
|---|---|---|---|---|---|
| NMI | Lab | Special calibration of air velocity measuring instruments in the Designated Institute BEV/E+E | |||
| AA 0608 | Lab | Hygrometer for the measurement of humidity | Gas flow max. 5 l / min Air pressure max. 10 bar Temperature range -40...180 C°1) | 0...98 % RH; (-70...-20) °C | (0.1 % * 4 * 10-6* (-20 °C-t)3 + (0.002 - 10-5*t) * Uw 0.1 % + (0.002 - 10-5 * t) *Uw |
| AA 0608 | Lab | Humidity generator (e.g. Humor 20)2) | Temperature range (25 ±3) °C | -20...0 °C >0 °C; 1...10) % RH >0 °C; 10...95) % RH | 0.1 % RH + 0.007 % * Uw 0.1 % RH 0.05 % RH + 0.005 % * Uw |
1) Calibration in the extended temperature range -70 °C to 200 °C (-94 °F to 392 °F) is performed upon request. Calibration for other physical quantities such as absolute humidity or mixing ratio is available upon request.
2) Wider ranges or dew point upon request.
Calibration Procedure
Air is generated (displayed) with a defined dew point temperature and a maximum gas flow of 5 l/min in a dual pressure, dual temperature humidity generator. This air stream is passed through a temperature-stabilised measurement chamber and there it produces a defined air humidity level, depending on the temperature, pressure and the displayed dew point temperature.
The humidity generated at the measurement location is determined by measuring the dew point temperature by means of a reference dew point mirror and the temperature by means of a calibrated Pt100 resistance thermometer and used as a reference value.
Inquire Calibration
Accompanying Slip
For efficient processing of your calibration order, please also send us a fully completed accompanying slip with the measuring device to be checked.
